This case is different from anything I've seen before. The outside diameter is smaller and the accessory clip I use for the final filter doesn't fit properly. Luckily I use a two stage system so I installed the clamps on a different case. The lid seal is also different. A seal is used, which is located on the housing neck. Previous units I've seen have a seal sitting on top. Nominally it appears to be in good condition and is not leaking. The included restrictive device was not required in my setup.
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